The implausible claim needed proof here isn't that one. Those state broadcasters absolutely do have their own angle (pro-state, and pro whatever the editorial staff is into, vaguely left of centre stuff these days).

They aren't on the same level as major US news networks when it comes to distortion and agenda-pushing though. This is my opinion, but there are plenty of systematic studies that show the same thing. If you look but can't find any then I'll come back with links.